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Spectroscopic study of Na–TCNQ in a poly(ethylene oxide) matrix (TCNQ = 7, 7′, 8, and 8′ tetracyanoquinodimethane)

Published online by Cambridge University Press:  31 January 2011

A. Arena ,
G. Di Marco ,
M. Lanza ,
S. Patané  and
G. Saitta
A. Arena
Affiliation:
Dipartimento di Fisica della Materia, e Tecnologie Fisiche Avanzate, Istituto Nazionale per la Fisica della Materia (INFM), Salita Sperone 31, I-98166 cp 57 S. Agata, Messina, Italy
G. Di Marco
Affiliation:
Istituto di Tecniche Spettroscopiche-CNR, Salita Sperone 31, I-98166 S. Agata, Messina, Italy
M. Lanza
Affiliation:
Istituto di Tecniche Spettroscopiche-CNR, Salita Sperone 31, I-98166 S. Agata, Messina, Italy
S. Patané
Affiliation:
Dipartimento di Fisica della Materia, e Tecnologie Fisiche Avanzate, Instituto Nazionale per la Fisica della Materia (INFM), Salita Sperone 31, I-98166 cp 57 S. Agata, Messina, Italy
G. Saitta
Affiliation:
Dipartimento di Fisica della Materia, e Tecnologie Fisiche Avanzate, Instituto Nazionale per la Fisica della Materia (INFM), Salita Sperone 31, I-98166 cp 57 S. Agata, Messina, Italy
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Abstract

X-ray Photoelectron Spectroscopy (XPS) and optical studies have been performed on P(EO)n –NaI–TCNQ (n = 1, 10) systems, obtained by means of a solid state reaction technique. The electron spectroscopy, the absorption in the ultraviolet visible near infrared range, and the infrared transmission findings allow us to conclude that the interaction among the polymer, the iodide, and the electron acceptor molecule results in the formation of the ion-radical salt Na–TCNQ and in the oxidation of I− to the metallic state. The presence within the examined specimens of crystalline and amorphous phases has been confirmed by the results of Differential Scanning Calorimetry (DSC) measurements. The optical, electronic, and thermal properties of the P(EO)n–NaI–TCNQ mixtures have then been correlated to the results of preliminary ac electrical transport investigations.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 5 , May 1997 , pp. 1405 - 1409
Copyright
Copyright © Materials Research Society 1997

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